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Re^4: Count non-empty hash valuesby Joost (Canon) |
on Oct 23, 2005 at 00:46 UTC ( [id://502264]=note: print w/replies, xml ) | Need Help?? |
grep just localizes the "current" item in the list to $_ - that's why /regex/ works in grep (and map and for(each) too): you can do any operation you want on $_ and as long as the statement(s) in the grep block return(s) a true value the original value will be in the resulting list (or in the count, if in scalar context).
I guess this is one of the points where perl is intuitive and "deep" at the same time.
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